Vehicle dynamics regulation system adapted to the rolling behaviour of a vehicle

• US 20060265108A1
• Filed: 06/23/2004
• Published: 11/23/2006
• Est. Priority Date: 07/11/2003
• Status: Abandoned Application

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Kieren, Martin, Nenninger, Gero, Nimmo, Matthew
• Application Number:
  US10/553,112
• Publication Number:
  US 20060265108A1
• Time in Patent Office: Days
• US Class Current: 701/1
• CPC Class Codes: B60G 17/0162 mainly during a motion involving steering operation, e.g. cornering, overtaking B60G17/0164 takes precedence
• CPC Class Codes: B60G 17/0182 involving parameter estimation, e.g. observer, Kalman filter
• CPC Class Codes: B60G 17/0195 characterised by the regulation being combined with other vehicle control systems conjoint control of vehicle sub-units including control of suspension systems B60W10/22
• CPC Class Codes: B60G 2300/026 Heavy duty trucks
• CPC Class Codes: B60G 2300/07 Off-road vehicles
• CPC Class Codes: B60G 2400/0511 Roll angle
• CPC Class Codes: B60G 2400/0521 Roll rate
• CPC Class Codes: B60G 2400/102 vertical
• CPC Class Codes: B60G 2400/104 lateral or transversal with regard to vehicle
• CPC Class Codes: B60G 2400/252 vertical
• CPC Class Codes: B60G 2400/41 Steering angle
• CPC Class Codes: B60G 2400/44 Steering speed
• CPC Class Codes: B60G 2400/61 Load distribution
• CPC Class Codes: B60G 2600/044 Alarm means
• CPC Class Codes: B60G 2600/07 Inhibiting means
• CPC Class Codes: B60G 2600/1877 Adaptive Control
• CPC Class Codes: B60G 2600/1879 Fuzzy Logic Control
• CPC Class Codes: B60G 2800/012 Rolling condition
• CPC Class Codes: B60G 2800/0194 transversal with regard to vehicle
• CPC Class Codes: B60G 2800/214 by varying the load distribution
• CPC Class Codes: B60G 2800/24 : Steering, cornering
• CPC Class Codes: B60G 2800/9124 : Roll-over protection systems, e.g. for warning or control
• CPC Class Codes: B60G 2800/915 : Suspension load distribution
• CPC Class Codes: B60G 2800/94 : Electronic Stability Program (ESP, i.e. ABS+ASC+EMS)
• CPC Class Codes: B60G 2800/96 : ASC - Assisted or power Steering control
• CPC Class Codes: B60T 2230/03 : Overturn, rollover
• CPC Class Codes: B60T 8/174 : characterised by using special control logic, e.g. fuzzy logic , neural computing
• CPC Class Codes: B60T 8/17551 : determining control parameters related to vehicle stability used in the regulation, e.g. by calculations involving measured or detected parameters
• CPC Class Codes: B60T 8/17554 : specially adapted for enhancing stability around the vehicles longitudinal axle, i.e. roll-over prevention road vehicle drive control systems for roll-over prevention otherwise than by controlling a particular sub-unit B60W30/04

Abstract

An arrangement relating to a device and a method for stabilizing a vehicle in a situation critical to rollover, where various controller input variables are measured by a sensor system, and a rollover-stabilization algorithm intervenes in the vehicle operation with the aid of an actuator, in order to stabilize the vehicle. In order to be able to take different loading conditions of the vehicle into account, a rollover tendency of the vehicle is estimated from the relationship between a variable describing the steering behavior of the vehicle and a variable describing the roll behavior of the vehicle, and the rollover tendency is taken into account in rollover stabilization.

Claims

1-11. -11. (canceled)

12. A method for a rollover stabilization of a vehicle in a critical driving situation, comprising:

measuring different driving-condition variables by a sensor system;

causing an actuator to intervene with a rollover-stabilization algorithm in a vehicle operation in a situation critical to rollover, in order to stabilize the vehicle; and

estimating information from a relationship between a steering variable and a roll variable, the information relating to a rollover tendency of the vehicle and being taken into account in a scope of the rollover stabilization.

13. The method as recited in claim 12, further comprising:

ascertaining one of an indicator variable and one of a characteristic property and a variable of the rollover stabilization as a function of the rollover tendency, wherein;

a stabilization action is one of enabled and deactivated in accordance with the indicator variable.

14. The method as recited in claim 12, wherein the steering variable includes one of a steering angle and a steering speed.

15. The method as recited in claim 12, wherein the roll variable includes one of contact patch forces of wheels, a compression travel, a vertical acceleration, a roll angle, and a roll rate.

16. The method as recited in claim 12, further comprising:

changing, as a function of the rollover tendency, one of a control threshold of the rollover-stabilization algorithm, a control deviation, and a controlled variable of the rollover-stabilization algorithm.

17. The method as recited in claim 12, further comprising:

ascertaining, from the steering variable and the roll variable, a rollover indicator indicating the rollover tendency of the vehicle.

18. The method as recited in claim 17, wherein the rollover indicator is determined by a fuzzy-information processing unit.

19. The method as recited in claim 18, further comprising:

weighting the rollover indicator by a weighting function indicating a quality of an estimation of the rollover indicator.

20. A vehicle-dynamics control system for a rollover stabilization of a vehicle in a critical driving situation, comprising:

a control unit for storing a rollover-stabilization algorithm;

a sensor system for measuring current, actual values of the control system;

an actuator for executing a stabilization action, wherein;

the sensor system ascertains a roll variable and a steering variable; and

a device for estimating a rollover tendency of the vehicle from the steering variable and the roll variable, the rollover tendency being taken into account in a scope of the rollover stabilization.

21. The vehicle-dynamics control system as recited in claim 20, wherein the control unit ascertains one of an indicator variable, with the aid of which a stabilization action is one of enabled and deactivated, a characteristic property, and a variable of the rollover-stabilization algorithm, as a function of the rollover tendency.

22. The vehicle-dynamics control system as recited in claim 20, wherein the sensor system includes a roll-rate sensor for ascertaining the roll variable.